Well, if you pour a bit of water on snow, it melts and then freezes altogether, forming ice too. You don't need large volumes of water for that, just couple of

Well, if you pour a bit of water on snow, it melts and then freezes altogether, forming ice too. You don't need large volumes of water for that, just couple of trucks of water twice a week. Plus, the ground is frozen 1 m deep by January. It's hard enough for one take-off roll.